一曲落已是半生情
[yī qŭ luò yĭ shì bàn shēng qíng]
'Yi Qu Luo Yi Shi Ban Sheng Qing' translates to 'A song has ended but it is half lifetime affection.' This indicates deep emotional sentiment, implying that sometimes one moment (a single tune/song) can mark a life-changing memory/event that stays with you for a long time, reflecting profound feelings of nostalgia or love.